Awesome
minidb
This is a minimal in-memory distributed master-less document database database.
API
Cluster:
- Auto-cluster: automatically create a cluster specified in the configuration
minidb_cluster:join(), or manually make a cluster passing a list of seedsminidb_cluster:make([bootstrap_node1]). - Cluster status:
minidb_cluster:status() - Join a cluster:
minidb_cluster:join('bootstrap_node') - Leave a cluster:
minidb_cluster:leave() - Ping a random node:
minidb:ping()
CRUD:
- Create/Update a key:
minidb:put(key, value) - Patch a value:
minidb:patch(key, {subkey1, subvalue1}) - Read a value:
minidb:get(key)orminidb:get(key, default) - Query database:
minidb:find([..]) - Get all keys:
minidb:keys() - Delete a key:
minidb:delete - Drop everything:
minidb:drop()
Query:
The query language is similar to the one used by mongodb:
minidb:find([{"section", {'$eq', "books"}}, {"likes", {'$gt', 100}])
Operators available:
| Op. | Name | Example |
|---|---|---|
'$eq' | Equals | {"section", {'$eq', "books"}} |
'$ne' | Not Equals | {"section", {'$ne', "books"}} |
'$gt' | Greater Than | {"likes", {'$gt', 100}} |
'$gte' | Greater or Equals | {"likes", {'$gte', 100}} |
'$lt' | Lower Than | {"likes", {'$lt', 100}} |
'$lte' | Lower or Equals | {"likes", {'$lte', 100}} |
Note: to get everything: minidb:find([]).
Build
$ rebar3 compile
Run demo
Start the first node:
$ make node1
Start the second node:
$ make node2
After 5 seconds, the second node will automatically connect to the first in a cluster.
To clean all the configuration (cluster informations):
$ make clean